The correct answer is (b) Ramesh Pokhariyal Nishank.
Bhagat Singh Koshiyari was the first Chief Minister of Uttarakhand, but he resigned after 13 months in office. Narayan Dutt Tiwari was the Chief Minister of Uttarakhand for two terms, but he did not complete his second term. Vijai Bahuguna was the Chief Minister of Uttarakhand for a year, but he was also unable to complete his term. Ramesh Pokhariyal Nishank was the Chief Minister of Uttarakhand from 2007 to 2012, and he was the only Chief Minister of Uttarakhand to complete his mandated term of five years.
Bhagat Singh Koshiyari was the first Chief Minister of Uttarakhand. He was sworn in on 9 November 2000. He resigned on 23 December 2001.
Narayan Dutt Tiwari was the Chief Minister of Uttarakhand from 23 March 2002 to 23 March 2007. He was also the Chief Minister of Uttar Pradesh from 1976 to 1977, 1984 to 1985, and 1991 to 1992.
Vijai Bahuguna was the Chief Minister of Uttarakhand from 13 March 2012 to 27 March 2012. He was also the Chief Minister of Uttarakhand from 13 March 2016 to 10 March 2017.
Ramesh Pokhariyal Nishank was the Chief Minister of Uttarakhand from 13 March 2007 to 13 March 2012. He was also the Minister of Human Resource Development in the Government of India from 2014 to 2019.